Computer enclosure with emi shielding clip

ABSTRACT

A computer enclosure includes a cover and a chassis. The cover includes a clasp. The chassis defines an engaging hole and a cutout adjacent to the engaging hole. An edge of the cutout extends in the cutout to form an elastic clip. The clip includes a driving portion which is located below the flange. The clasp penetrates the engaging hole sliding, engages with the flange, and simultaneously pushes the driving portion to place the clip in contact with the cover.

BACKGROUND

1. Technical Field

The present disclose relates to computer enclosures, and moreparticularly, to a computer enclosure with an electromagneticinterference (EMI) shielding clip.

2. Description of Related Art

Equipped with removable covers, computer enclosures incorporate suchelectronic components as disk storage and PCI cards normally encasedwithin a metal enclosure. Despite providing an “outer skin” for thecomputer, the covers are themselves unshielded. The encased electroniccomponents are prone to conductive electromagnetic signal leakage fromthe covers. Such electromagnetic emissions can significantly impactperformance of other electronic components outside the enclosure, andcomponents within the enclosure can be affected by the emissions of theelectronic components from outside the enclosure. Thus, shieldingcomponents of highly conductive material in a sealed enclosure isnecessary.

A common response to this necessity is to use compliant spring fingersaround the cover's perimeters to make grounding contact with thecomputer enclosure in order to lock in the electromagnetic emissionswithin the enclosure. The spring fingers are made of electricallyconductive material, and through the use of fingers around the edges ofthe cover or base enclosure, grounding contact is achieved via thefingers when the cover is installed. However, after the spring fingersare used for a long time, the fingers are easily plastically deformed.As such, the grounding contact is influenced to depress the EMIshielding the enclosure.

Therefore, there is room for improvement within the art.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the embodiments can be better understood with referencesto the following drawings. The components in the drawings are notnecessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the embodiments. Moreover, in thedrawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is an exploded view of a computer enclosure in accordance with anembodiment of the present disclose.

FIG. 2 is an enlarged view of circled portion II of FIG. 1.

FIG. 3 is an enlarged view of circled portion III of FIG. 1.

FIG. 4 is a partially assembled view of the computer enclosure of FIG.1.

FIG. 5 is an enlarged view of circled portion V of FIG. 4.

FIG. 6 is a view of another state of the cover with the chassis of FIG.5.

DETAILED DESCRIPTION

The disclosure is illustrated by way of example and not by way oflimitation in the figures of the accompanying drawings in which likereferences indicate similar elements. It should be noted that referencesto “an” or “one” embodiment in this disclosure are not necessarily tothe same embodiment, and such references mean at least one.

Referring to FIGS. 1 and 2, a computer enclosure includes a chassis 20and a cover 40. The chassis 20 includes a bottom panel 21 and a pair ofside panels 23 extending from opposite edges of the bottom panel 21. Topedges of the bottom panel 21 are bent towards each other to form a pairof flanges 25. Each flange 25 defines a plurality of engaging holes 251therein. Each engaging hole 251 includes a wide insert hole 256 and anarrow restricting hole 257.

The flange 25 defines a cutout 253 adjacent to each engaging hole 251.An edge of the cutout 253, which is adjacent to the restricting hole257, extends in the cutout 253 to form an elastic EMI shielding clip 30.The clip 30 includes a connection portion 31, a contacting portion 32,an extending portion 33, and a driving portion 34. The connectionportion 31 is connected to the edge of the cutout 253. The contactingportion 32 tilts upwardly from the connection portion 31. The extendingportion 33 extends downwardly from a free end of the contacting portion32. A free end of the extending portion 33 extends through the cutout253, and is located below the flange 25. The driving portion 34 extendssubstantially parallel to the flange 25, and connects with the free endof the extending portion 33 via an arc-shaped transition portion 35 (seeFIG. 5).

Referring to FIGS. 1 to 3, the cover 40 is capable of being mounted onthe flanges 25 of the pair of side panels 23. A bottom side of the cover40 forms a plurality of clasps 41 corresponding to the engaging holes251 of the flanges 25. Each clasp 41 includes a root portion 43 and anengaging portion 45. The root portion 43 is connected to the cover 40,and the engaging portion 45 extends from a free end of the root portion43. The engaging portion 45 has a slope 451 formed thereon facing thecover 40. A distance between the cover 40 and an end of the slope 451,which connects to the root portion 43, is smaller than that between thecover 40 and the other end of the slope 451 which is free.

Referring to FIGS. 4 to 6, to attach the cover 40 to the chassis 20, thecover 40 is placed on the flanges 25 of the side panels 23. The clasps41 of the cover 40 are inserted in the insert holes 256 of the flanges25. The cover 40 slides on the flanges 25. The root portion 43 of theclasp 41 slides from the insert hole 256 to the restricting hole 257.Simultaneously, the transition portion 35 of the clip 30 will act toguide the slope 451 of the clasp 41 to engage with the driving portion34 of the clip 30. The driving portion 34 is pushed towards the cover 40by the slope 451. Therefore, the clip 30 is bent towards the cover 40,and the contacting portion 32 of the clip 30 firmly makes contacts withthe cover 40 to achieve the EMI shielding. Because the root portion 43of the clasp 41 slides in the restricting hole 257, the engaging portion45 of the clasp 41 is located below the flange 15 to have the clasp 41clasped on the flange 15. The cover 40 is then secured onto the chassis20 by conventional means, such as screwing.

The clasp 41 engages with the flange 25, and simultaneously pushes theEMI shielding clip 30 into contact with the cover 40 to achieve EMIshielding. Even if the clip 30 is plastically deformed, the clasp 41 canstill push the clip 30 to contact with the cover 40.

It is to be understood, however, that even though numerouscharacteristics and advantages of the embodiments have been set forth inthe foregoing description, together with details of the structure andfunction of the embodiments, the disclosure is illustrative only, andchanges may be made in detail, especially in matters of shape, size, andarrangement of parts within the principles of the present disclosure tothe full extent indicated by the broad general meaning of the terms inwhich the appended claims are expressed.

1. A computer enclosure, comprising: a cover comprising a clasp; and achassis defining an engaging hole and a cutout adjacent to the engaginghole; an elastic clip, formed on an edge of the cutout, and the clipcomprising a driving portion which is located below the flange; whereinthe clasp penetrates the engaging hole, and slides in the engaging holeto engage with the flange and simultaneously push the driving portion tohave the clip contacting with the cover.
 2. The computer enclosure ofclaim 1, wherein the chassis comprises a bottom panel and a pair of sidepanels extending from opposite edges of the bottom panel; top edges ofthe bottom panel are bent towards each other to form a pair of flanges;the engaging hole and the cutout are defined in at least one of the pairof flanges; and the flanges supports the cover thereon.
 3. The computerenclosure of claim 1, wherein the clasp comprises a root portion and anengaging portion connected with the root portion; the root portion iscoupled to the cover, and the engaging portion comprises a slope whichis capable of pushing the driving portion when the clip contacts withthe cover.
 4. The computer enclosure of claim 3, wherein the slope facesthe cover, and a distance between the cover and an end of the slope,which connects to the root portion, is less than that between the coverand the other end of the slope, which is free.
 5. The computer enclosureof claim 3, wherein the clip comprises an arc-shaped transition portionconnected to the driving portion.
 6. The computer enclosure of claim 5,wherein the clip comprises a connection portion connected to the edge ofthe cutout; a free end of the connection portion tilts upwardly to forma contacting portion which contacts with the cover.
 7. The computerenclosure of claim 6, wherein a free end of the contacting portionextends downwardly and through the cutout to form an extending portion,and the transition portion is connected with an end of the extendingportion which is located below the flange.
 8. The computer enclosure ofclaim 1, wherein the engaging hole comprises an insert hole and arestricting hole communicating with the insert hole, the restrictinghole restricts the clasp received therein, and the insert hole iscapable of receiving the clasp inserted therein to have the clasp slideinto the restricting hole.
 9. A computer enclosure, comprising: a covercomprising a clasp, the clasp comprising an engaging portion which has aslope; a chassis comprising a side panel, a flange formed on a top edgeof the side panel, the flange defining a cutout therein, a clip formedon an edge of the cutout, and the clip comprising a driving portionbelow the flange; wherein the cover is located on the flange, the claspengages with the flange, and the slope engages the driving portion tourge the driving portion towards the cover and place the clip in contactwith the cover.
 10. The computer enclosure of claim 9, wherein theflange further defines an engaging hole adjacent to the cutout, and theengaging hole receives the clasp inserted therein.
 11. The computerenclosure of claim 10, wherein the engaging hole comprises an inserthole and a restricting hole communicating with the insert hole, therestricting hole restricts the clasp received therein, and the inserthole is capable of receiving the clasp inserted therein to have theclasp slide into the restricting hole.
 12. The computer enclosure ofclaim 10, wherein the chassis comprises a bottom panel and a pair ofside panels extending from opposite edges of the bottom panel; and a topedge of one of the pair of side panels is bent to form the flange. 13.The computer enclosure of claim 9, wherein the clasp comprises a rootportion, the root portion is coupled to the cover, and the engagingportion is connected with the root portion.
 14. The computer enclosureof claim 9, wherein the slope faces the cover, and a distance betweenthe cover and an end of the slope, which connects to the root portion,is less than that between the cover and the other end of the slope,which is free.
 15. The computer enclosure of claim 13, wherein the clipcomprises an arc-shaped transition portion connected to the drivingportion.
 16. The computer enclosure of claim 15, wherein the clipcomprises a connection portion connected to the edge of the cutout; afree end of the contacting portion tilts upwardly to form a contactingportion which contacts with the cover.
 17. The computer enclosure ofclaim 16, wherein a free end of the contacting portion extendsdownwardly and through the cutout to form an extending portion, and thetransition portion is connected with an end of the extending portionwhich is located below the flange.